Biofouling control in reverse osmosis by nitric oxide treatment and its impact on the bacterial community

Hyun-Suk Oh, Florentin Constancias, Chitrakala Ramasamy, Pei Yi Peggy Tang, Mon Oo Yee, Anthony G. Fane, Diane McDougald, Scott A. Rice

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Abstract

Recent discoveries regarding the regulation of the biofilm life cycle by bacterial signaling systems have identified novel strategies for manipulation of biofilm development to control the biofouling of membrane-based water purification systems. Nitric oxide (NO) signaling has been shown to induce dispersal of a wide range of single- and multi-species biofilms. However, the impact of NO-mediated biofilm dispersal on the taxa composition of natural communities as well as the potential selection for non-responding community members have rarely been addressed. Here, we investigated the effect of diethylenetriamine (DETA) NONOate, an NO donor with a long half-life, on biofilm dispersal of a bacterial community responsible for membrane biofouling to address this question. The biofilm of a complex community from a fouled industrial reverse osmosis (RO) membrane was dispersed over 50% by 500 μM of DETA NONOate treatment in a continuous flow system. Once-daily treatment with DETA NONOate in a laboratory-scale RO system demonstrated its anti-biofouling effect by delaying the transmembrane pressure increase during constant-flux filtration. Characterization of the bacterial communities of dispersed cells and remaining biofilm cells using a 16S Illumina MiSeq metabarcoding approach demonstrated that biofilm dispersal by DETA NONOate had no selection bias in the community.

Original languageEnglish
JournalJournal of Membrane Science
Volume550
Pages (from-to)313-321
ISSN0376-7388
DOIs
Publication statusPublished - 15. Mar 2018

Keywords

  • Nitric oxide
  • Biofilm dispersal
  • Membrane biofouling
  • Bacterial community
  • Reverse osmosis

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    Oh, H-S., Constancias, F., Ramasamy, C., Tang, P. Y. P., Yee, M. O., Fane, A. G., McDougald, D., & Rice, S. A. (2018). Biofouling control in reverse osmosis by nitric oxide treatment and its impact on the bacterial community. Journal of Membrane Science, 550, 313-321. https://doi.org/10.1016/j.memsci.2018.01.012